AP Euro Unit 4 Review: Scientific, Philosophical, and Political Developments

The Scientific Revolution and Enlightenment did not emerge from nothing. Renaissance humanism had already elevated classical texts and human potential. The Protestant Reformation had fractured religious authority and encouraged individuals to question institutional power. Expanding global exploration brought new empirical data about the world. Rising literacy and print culture created audiences for new ideas. Together, these developments made 17th- and 18th-century Europeans more receptive to observation, skepticism, and reason as tools for understanding the world.

• Renaissance humanism: Revived classical learning and emphasized human reason and individual inquiry, laying intellectual groundwork for scientific questioning.
• Protestant Reformation: Fractured the Catholic Church's monopoly on truth, making it more acceptable to challenge traditional authorities in other domains.
• Print culture: The spread of printed books and pamphlets expanded literacy and allowed new scientific and philosophical ideas to circulate across Europe rapidly.
• Global exploration: Contact with new peoples, plants, and phenomena provided empirical evidence that ancient authorities had not accounted for, encouraging fresh observation.

The Scientific Revolution replaced reliance on ancient authorities with systematic observation, experimentation, and mathematics. In astronomy, Copernicus proposed heliocentrism, Kepler showed planets move in elliptical orbits, Galileo used the telescope to observe Jupiter's moons and support Copernican theory, and Newton unified motion and gravity into mathematical laws. In medicine, Harvey demonstrated blood circulation, overturning Galen's humoral theory. Bacon promoted inductive reasoning from observation; Descartes promoted deductive, mathematical reasoning. Both methods shaped the scientific method. Importantly, alchemy and astrology did not vanish: they coexisted with new science because they shared the idea of a knowable, predictable universe.

• Copernican hypothesis: Nicolaus Copernicus's proposal that the sun, not the earth, is at the center of the universe, directly challenging the Ptolemaic geocentric model.
• Newton's laws of motion and gravity: Isaac Newton's mathematical principles that explained planetary motion and terrestrial mechanics, presenting the universe as governed by predictable natural laws.
• Circulation of blood: William Harvey's discovery that blood moves continuously through the body via the heart, replacing Galen's static humoral model.
• Inductive reasoning: Francis Bacon's method of building general conclusions from specific observations, foundational to empirical science.
• Cartesian philosophy: Descartes' method of systematic doubt and mathematical deduction, which emphasized mechanical causation over scholastic tradition.

Enlightenment philosophes applied the reasoning of the Scientific Revolution to human institutions. Voltaire and Diderot criticized religious intolerance and arbitrary power; Diderot co-edited the Encyclopedie to compile and spread rational knowledge. Locke argued that government rests on the consent of the governed and must protect natural rights to life, liberty, and property. Rousseau developed the concept of the general will and the social contract, though he controversially excluded women from political life. Adam Smith challenged mercantilist theory with arguments for free trade and free markets. Salons, coffeehouses, and print media disseminated these ideas to a growing literate public. Deism replaced orthodox Christianity for some thinkers, positing a creator who did not intervene in natural affairs. Mary Wollstonecraft's A Vindication of the Rights of Woman pushed Enlightenment equality arguments to include women.

• Natural rights: Locke's concept that individuals possess inherent rights to life, liberty, and property that governments must protect and cannot legitimately violate.
• Social contract: The idea, developed by Locke and Rousseau, that legitimate government rests on an agreement between rulers and the governed rather than on divine right.
• Enlightenment philosophes: 18th-century intellectuals, including Voltaire, Diderot, and Rousseau, who applied reason and skepticism to critique existing political, religious, and social institutions.
• Deism: The belief that a rational creator made the universe but does not intervene in it, favored by some Enlightenment thinkers as an alternative to revealed religion.
• Adam Smith: Scottish economist whose Wealth of Nations argued for free markets and free trade, directly challenging mercantilist economic theory.

In the 17th century, periodic famines, plague, and high infant mortality kept European populations in check. By the 18th century, several changes stabilized and then grew the population. The Agricultural Revolution, including crop rotation, improved tools, and better transportation, raised food productivity. Plague disappeared as a major epidemic disease, and Lady Mary Wortley Montagu introduced smallpox inoculation to England from the Ottoman Empire, reducing mortality further. The European marriage pattern, in which people married later and some never married, limited birth rates even as death rates fell. Urbanization increased as people moved to cities for economic opportunity, bringing new social problems including poverty, crime, and prostitution that reformers began to address.

• Agricultural Revolution: 18th-century improvements in crop rotation, farming techniques, and transportation that raised food productivity and supported steady population growth.
• European marriage pattern: The demographic practice of delayed marriage and high rates of celibacy that restrained population growth even as mortality declined.
• Lady Mary Wortley Montagu: English aristocrat who introduced smallpox inoculation to England after observing the practice in the Ottoman Empire, contributing to falling mortality rates.
• Demographic change: The shift from periodic population crises caused by famine and plague to steady 18th-century population growth driven by improved agriculture and medicine.

European art and culture shifted significantly across this period. Until about 1750, Baroque art and music, exemplified by Gian Bernini's sculpture and the compositions of J. S. Bach and George Frideric Handel, promoted religious feeling and glorified monarchical power. After 1750, art and literature increasingly reflected bourgeois commercial society and private life. Neoclassicism, seen in Jacques-Louis David's paintings and the Pantheon in Paris, expressed Enlightenment ideals of citizenship and political participation. Print culture expanded despite censorship: newspapers, pamphlets, novels, and the Encyclopedie reached a growing literate public and created a new public opinion. Coffeehouses and salons served as venues where ideas circulated across social boundaries. Literature and natural science also exposed Europeans to non-European peoples, occasionally challenging accepted social norms.

• Baroque music: Musical and artistic style dominant until about 1750 that promoted religious feeling and glorified monarchs, associated with Bach, Handel, and Bernini.
• Neoclassicism: 18th-century artistic movement that revived classical Greek and Roman forms to express Enlightenment ideals of civic virtue, citizenship, and political participation.
• Print culture: The expanding world of newspapers, pamphlets, novels, and encyclopedias that, despite censorship, created a literate public capable of forming and sharing political opinions.
• Consumer Revolution: The 18th-century increase in consumption of goods and leisure activities that reflected rising bourgeois prosperity and reshaped social values.

In eastern and central Europe, several monarchs practiced enlightened absolutism, using Enlightenment rhetoric to justify reforms while retaining absolute authority. Frederick II of Prussia promoted legal reform, religious toleration, and efficient administration, though he never surrendered royal power. Joseph II of Austria went further, abolishing serfdom and extending toleration to religious minorities and, in some areas, civil equality to Jews. Maria Theresa of Austria modernized Habsburg administration without fully embracing Enlightenment liberalism. By 1800, most western and central European governments had extended toleration to Christian minorities. The Peace of Westphalia (1648) had already reshaped the political map by limiting Holy Roman Empire sovereignty, allowing Prussia to rise and pushing the Habsburgs eastward into Austria, setting the stage for the power dynamics of this period.

• Enlightened absolutism: A form of monarchy in which rulers like Frederick II and Joseph II applied Enlightenment ideas such as legal reform and religious toleration while maintaining full royal authority.
• Frederick II of Prussia: Prussian king who embodied enlightened absolutism through legal reform, religious toleration, and military efficiency, while never limiting his own power.
• Joseph II of Austria: Habsburg emperor who abolished serfdom, extended religious toleration, and promoted civil equality for Jews, representing the most ambitious enlightened absolutist reforms.
• Peace of Westphalia: The 1648 treaties that ended the Thirty Years' War, limited Holy Roman Empire sovereignty, and enabled Prussia's rise and the Habsburg shift eastward into Austria.
• Religious toleration: The policy, extended by most western and central European governments by 1800, of allowing Christian minorities and in some states Jews to practice their faith without persecution.

Topic 4.7 asks you to synthesize the unit by explaining how and why these intellectual movements challenged Europe's existing order. The causes include the Renaissance recovery of classical texts, the Reformation's fracturing of religious authority, expanding global contact, and the development of print culture. The effects were wide-ranging: the Church's authority over natural knowledge was undermined; divine right monarchy was challenged by social contract theory; mercantilism was challenged by free-market economics; and new public venues created a sphere of opinion outside royal or clerical control. Crucially, older traditions did not disappear. Alchemy, astrology, and religious orthodoxy persisted alongside new science. The AP skill here is causation: connecting specific intellectual developments to specific institutional or social changes, while acknowledging continuity.

• Empiricism: The philosophical commitment to knowledge derived from observation and experiment, which underpinned both the Scientific Revolution and Enlightenment critiques of tradition.
• Rationalism: The use of reason and logical deduction as the primary path to knowledge, associated with Descartes and applied by philosophes to political and social questions.
• Public sphere: The network of salons, coffeehouses, and print media that allowed literate Europeans to debate ideas outside the control of monarchs and the Church.
• Skepticism: The Enlightenment disposition to question received authority and demand evidence, applied to Church doctrine, ancient science, and absolute political power.